[pkg-dhcp-devel] Bug#643771: isc-dhcp-client: host name should be set to non-fqdn [patch]

[Wouter Van Hemel]

Package: isc-dhcp-client
Version: 4.2.2-1
Followup-For: Bug #643771

Hello,

According to the Debian reference, the host name (as set by /etc/hostname) should be non-fqdn, i.e. a simple host name without domain name.

DHCP may contain pretty random host/domain names, and changing the host name on the machine might trigger a denial of service as services (including X) can't connect or spawn new processes anymore when a new DHCP packet arrives and the host name is changed while those services are already running.

Attached you find a simple patch that strips the domain name part of $new_host_name in /etc/dhclient-script to bring it in line with the Debian reference and user expectations. I'm not going to elaborate on the benefits and drawbacks of using the DHCP host name field; there are probably valid reasons either way and I'm not qualified enough to discuss or acknowledge all possible network configurations.


Regards,

  Wouter

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.39-2-686-pae (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=nl_BE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages isc-dhcp-client depends on:
ii  debianutils      4.0.4     
ii  iproute          20110629-1
ii  isc-dhcp-common  4.2.2-1   
ii  libc6            2.13-21   

isc-dhcp-client recommends no packages.

Versions of packages isc-dhcp-client suggests:
pn  avahi-autoipd  <none>
pn  resolvconf     <none>

-- no debconf information
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